Question about 1999 Buick Park Avenue

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P1404 error code

I have a 1999 Buick Park Avenue Ultra and the engine trouble light keeps coming on. I hooked up a scanner and I get a P1404. What is it and how do I fix it.

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  • ribenjamin Nov 10, 2008

    As soon as it clears up outside I am going to try it out. It is cold and rainy out there. If cleaning doesn't work I'll replace the EGR next month when I get paid. Thanks alot for letting me know what the problem is and how to correct it. I'll try cleaning it this week. At least I learned what the problem is.

  • fairfelixcat Jan 10, 2009

    motor heats up on road will not accelrate and all instrument lights com on

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  • Len Gagliardi
    Len Gagliardi Nov 14, 2008

    No problem! Let me know if you need anything else.

  • kirk nelson Apr 23, 2013

    what if I've replace the EGR valve and I'm still getting the error code P1404?

  • Phil Mayfield
    Phil Mayfield Dec 09, 2016

    The carbon could be built up inside the manifold under the EGR. This happened to me on my Chevy. It was thick too.

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